It is determined that a certain light wave has a wavelength of 3.012 ×10−12 m. The light travels at 2.99 ×108 m/s. What is the frequency of the light wave? (Round your answer to three significant figures.)

Answer:

the answer is 41.65 J

Final answer:

The kinetic energy of a bowling ball with a mass of 1.7 kg and a velocity of 7.0 m/s is calculated using the kinetic energy formula KE = 1/2 mv^2, resulting in a kinetic energy of 41.65 joules.

Explanation:

The subject of this question is physics, specifically covering the topic of kinetic energy which is a part of mechanical energy. The grade level of this question is high school. To calculate the kinetic energy of the bowling ball, we use the kinetic energy formula:

KE = ½ mv² where KE is kinetic energy, m is mass in kilograms, and v is velocity in meters per second.

Plugging in the given values (mass m = 1.7 kg, velocity v = 7.0 m/s), the calculation is as follows:

KE = ½ × 1.7 kg × (7.0 m/s)²

KE = 0.85 kg × 49 m²/s²

KE = 41.65 joules

So, the kinetic energy of the bowling ball is 41.65 joules.

Answer:

False

Explanation:

It is false because the greater the force, the greater the friction.

Answer: 2.7 x 10^5 joules

Explanation:

Given that:

Time taken = 3 minutes

convert time in minutes to seconds

(Since 1 minute = 60 seconds

3 minutes = 3 x 60 = 180 seconds)

Power of toaster = 1500 watt

Work done by the toaster = ?

Recall that power is the rate of work done per unit time

i.e Power = work/time

work = Power x Time

Work = 1500 watt x 180 seconds

Work = 270000J

Place the result in standard form

270000J = 2.7 x 10^5J

Thus, 2.7 x 10^5 joules of work is done by the toaster.

I h abitats is a boy or a party for me and you Friday the 13th to make a hoodie is better single

Answer:

To distinguish results based on the only two variables of

awareness.

Explanation:

Final answer:

Scientists use two models of light: the wave model for interference and color observations, and the particle model for emission and absorption processes.

Explanation:

Scientists use two different models of light, namely the wave model and the particle model, because each is useful in explaining different phenomena associated with light.

While the wave model of light is excellent for describing scenarios such as the bending of light around edges, interference patterns, and observations of color, the particle model explains how light is emitted or absorbed by material.

Moreover, ray tracing, a more straightforward approach, is used for predicting images formed by lenses and mirrors, where light is interacting with objects much larger than a wavelength of light.

According to Essential Knowledge 6.F.4, the nature of light requires that different models are most appropriate at different scales. Furthermore, in the realm of quantitative models, a model of light propagation can predict outcomes that are testable and applicable in fields like lithography and sample analyses.

Thus, scientists often select a model based on the scale and context of the phenomenon they are investigating.

Answer:

Friction between the box and the floor is 25N to the left

Explanation:

There are two forces acting on the box along the horizontal direction:

- The force of push applied by the worker, in the forward direction, F

- The force of friction, [tex]F_f[/tex], acting in the opposite direction (backward)

So the net force acting on the box is

[tex]F_{net}=F-F_f[/tex]

According to Newton's second law of motion, the net force on an object is equal to the product between its mass (m) and its acceleration (a), so we can write:

[tex]F_{net}=ma[/tex]

And so

[tex]F-F_f = ma[/tex]

However, in this case the box is moving at constant speed; this means that its acceleration is zero:

[tex]a=0[/tex]

Therefore we have:

[tex]F-F_f=0[/tex]

Which means

[tex]F_f=F[/tex]

And since we are told that

[tex]F=25 N[/tex]

This means that the force of friction is also 25 N:

[tex]F_f=F=25 N[/tex]

Answer:

C.Friction between the box and the floor is 25N to the left.

Explanation:

One can conclude that the friction between the box and the floor is 25N to the left.

Frictional force is a force that opposes motion of a body. It acts in the opposite direction as the net force applied on a body.

If you traveled to Mars, your mass would be exactly, precisely equal to your mass on Earth, PROVIDED you did not relieve the boredom of space travel by eating too many astronaut steaks along the way.

The only things that can affect your mass are your personal diet, exercise, sleep, and stress habits.  

Your mass has nothing to do with gravity. Your WEIGHT has.

Answer:

Sure i can help you

Explanation:

6) The force pairs are drawn on the diagram to the left.

a. What is the action force acting on

The Rocket pushes out gas

b. What is the reaction force acting on?

Gas on the rocket

C. If the forces are equal and opposite why does the rocket ship move?

Answer: Rocket Is its own system, So gas creates outside force on the rocket

Answer:

1,2,3,6

Explanation:

This is correct because i took the quiz and got it correct

1 2 3 and 6 are convex lenses.

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There is a misspelling: "change in personality is 5M/S". It should be "change in velocity is 5m/s"

Answer: 0.5 m/s^2

Explanation:

acceleration = ?

change in velocity = 5m/s

Time = 10 seconds

Acceleration is the rate of change of velocity per unit time. it is measured in metres per second square.

i.e Acc = (change in velocity) time

Acc = 5m/s / 10 seconds

Acc = 0.5 m/s^2

Thus, the acceleration is 0.5 m/s^2

Answer: At the molecular level, temperature is related to the random motions of the particles (atoms and molecules) in matter. ... The temperature of the puddle, or of any object, is a measure of the average of the individual translational energies of all of its atoms or molecules.

Explanation: my science teacher already tought us this

Answer:

The answer is A.

Explanation:

Since you're increasing the energy, the frequency would start increasing. The wavelength would start decreasing, since you're putting more energy into the slinky and making it go faster and faster.

When natural gas is used to heat water, a conversion of chemical energy into thermal energy is taking place. The Option A.

In this process, natural gas which contains stored chemical energy undergoes combustion in a water heater. This combustion releases heat energy which is transferred to the water, raising its temperature.

The chemical energy in the natural gas is transformed into thermal energy leading to hot water for various domestic purposes such as bathing and heating.

This conversion helps in household heating systems and makes efficient use of the chemical energy stored in natural gas to provide thermal comfort and convenience in homes.

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The conversion taking place when natural gas is used to heat water is 'chemical energy into thermal energy'. The energy from the chemical bonds in natural gas is released and changed to heat, which warms the water.

When natural gas is used to heat water, the type of conversion taking place is 'a chemical energy into thermal energy'. This happens because natural gas, a fossil fuel, is burned in this process. The energy stored in the chemical bonds of the gas is released and converted to thermal energy (heat), which is used to warm up the water.

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Answer:

Position 3 has the most kinetic energy

Position 1 has the least potential energy

Explanation:

Kinetic energy: It is the moust because the iver is falling straight down

Potential energy:  It is the least because of how he is positioned, it's nearly straight.

The point at which the diver has the greatest kinetic energy and the least potential energy is at point 4.

To explain why, let's break down the concepts of kinetic and potential energy in the context of the diver's motion.

1. Kinetic Energy (KE): This is the energy associated with an object in motion. It depends on both the mass of the object and its velocity. KE = (1/2)mv^2, where "m" is the mass and "v" is the velocity.

2. Potential Energy (PE): In the case of a diver on a diving board, potential energy is gravitational potential energy. It is the energy an object has due to its position relative to a reference point (usually the ground). PE = mgh, where "m" is the mass, "g" is the acceleration due to gravity, and "h" is the height above the reference point.

At point 1, the diver is at the highest point on the diving board. Therefore, the potential energy is at its maximum because the height above the reference point (the water surface) is the greatest. At this point, the diver has little or no kinetic energy because they are momentarily at rest.

As the diver descends from point 1 to point 4, their height above the water decreases, reducing their potential energy. Simultaneously, their velocity increases, which means their kinetic energy also increases.

At point 4, the diver is at the lowest point of their dive, very close to the water surface. Here, their potential energy is minimal, as they are close to the reference point. At the same time, their velocity is at its maximum, resulting in the highest kinetic energy.

In conclusion, point 4 represents the moment of the greatest kinetic energy and the least potential energy because the diver is in rapid motion close to the water's surface, having converted most of their potential energy into kinetic energy during the dive.

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Answer:

Braking distance of vehicle is 9.97 m

Explanation:

It is given initial velocity of the vehicle u = 13.4 m/sec

Acceleration of the vehicle [tex]a=-9m/sec^2[/tex]

As the vehicle finally stops so final velocity of the vehicle v = 0 m/sec

We have to find the braking distance s

From third equation of motion

[tex]v^2=u^2+2as[/tex]

[tex]0^2=13.4^2+2\times -9\times s[/tex]

s = 9.97 m

So braking distance of the vehicle is 9.97 m

Answer:

D, reeling in a fish

Explanation:

Answer:the answer is D. Reeling in a fish with a fishing pole

Explanation:

you have to pull on the fish with the fishing pole in order to catch the fish

hope this helps

Answer:

4950 meters

Explanation:

Recall that the formula for the speed (v) is given by the quotient of the distance traveled (d)  divided by the time (t) it took to cover that distance:

[tex]v=\frac{d}{t}[/tex]

Therefore, for this case in which the car travels at 55 m/s for 90 seconds, we can replace these values in the formula, and solve for the distance covered:

[tex]v =\frac{d}{t} \\55 \frac{m}{s} =\frac{d}{90\,s} \\d=55*90 m\\\\d=4950\,m[/tex]

The speed of the players just after the collision is (D) 0.81 m/s

Given that the mass of the fullback is m = 88kg

mass of the opponent, M = 97 kg

speed of the fullback, u = 5 m/s

speed of the opponent, U = 3 m/s

In an inelastic collision, the two bodies move together at the same speed and the total momentum of the system remains conserved.

Let the final speed be v, then by conserving the momentum we get:

mu - MU = (m + M)v

Since the opponent must be moving in opposite direction to the fullback, therefore his momentum is -MU.

88×5 - 97×3 = (88 +97)v

149 = 185v

v = 0.81 m/s

So both the players move with a speed of 0.81 m/s

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Answer:

i think it is with friction because when we move we go against friction so like when were walking friction is trying to decrease our speed

Explanation:

Answer:

The iron ball is suspended from a box that floats in water. The box has a height of 5.00 cm, a face area of 10.0 cm ​ 2 ​ , and a density of 0.30 g/cm3, and 2.00 cm of its height is above the water surface. What’s the radius of the ball? Hints: ❏ Identify all forces acting on the box and write Newton’s second law. ❏ The box is stationary, which means the forces (including buoyant force) are balanced. You can use this to find tension in the rope. ❏ Identify all forces acting on the ball and write Newton’s second law. ❏ Iron ball is stationary, which means the forces (including buoyant force) are balanced.

Step by step:

Answer:

First blank is Speed, The Second Blank is Mass

Explanation:

Velocity is always speed and for mass thats just what they taught us>>>

Because velocity is a vector quantity, direction matters.

Velocity is the rate of change of displacement. It is essentially a vector quantity.

Speed of an object moving can never be negative. The velocity of a moving object can be zero.

Speed gives us an idea of how fast an object is moving whereas velocity not only tells us its speed but also tells us the direction the body is moving in.

Initial velocity describes how fast an object travels when gravity first applies force on the object. On the other hand, the final velocity is a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration.

The motion with constant velocity is the simplest form of motion.

Vector is the quantity that has both magnitude and direction.   For example, displacement, force, torque, momentum, acceleration, velocity, etc.

Thus, velocity has speed as well as direction, so it is vector quantity.

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Answer: 13.46 m/s

Explanation:

Initial velocity V1 = 5.82 m/s

acceleration A = 2.35m/s^2

Time taken T = 3.25s

Final velocity V2 = ?

Recall that acceleration is the rate of change of velocity per unit time i.e acceleration = (V2 - V1)/T

2.35m/s^2 = (V2 - 5.82 m/s) / 3.25s

cross multiply

2.35m/s^2 x 3.25s = (V2 - 5.82 m/s)

7.6375m/s = V2 - 5.82 m/s

V2 = 7.6375m/s + 5.82m/s

V2 = 13.46 m/s

Thus, the car final velocity is 13.46 m/s

Answer:

The final velocity is 13.5m/s

Explanation:

a = (v-u)/t

2.35 = (v-5.82) / 3.25

7.6375 = v - 5.82

v = 7.6375 + 5.82

v = 13.5 m/s

An electromagnetic wave can travel through a vacuum without a medium, while a mechanical wave requires a medium to propagate. The answer is option D.

One difference between an electromagnetic wave and a mechanical wave is how they propagate through space. An electromagnetic wave can travel through a vacuum without the need for a medium, whereas a mechanical wave must have a medium like air, water, or solids to travel through. This is because electromagnetic waves, which include light waves, are composed of oscillating electric and magnetic fields that can generate each other, whereas mechanical waves, like sound waves, rely on the vibration of particles in a medium to propagate.

Answer:

C. Seed C germinates more with more water.

Explanation:

In this experiment, the seed (seed C) was subjected to certain conditions and the result is what has been presented for us to make an inference.

We observe the following from the information given us:

I. the same seeds were used for the experiment

II. the same heat medium of 24 °C was used for all the seeds

III. different daily amount of water was supplied the seeds - 90 ml, 50 ml and 10 ml

From the experiment, we have this result:

the seed that was watered with 10 ml daily did not sprout anything, the seed that was watered with 50 ml daily yielded 12 sprouts while the seed that was watered with 90 ml daily yielded 16 sprouts

When we consider the amount of water given the seed & the produce of the seed, it is safe to conclude that with increase in daily water, there is increase in the number of sprouts by the seed

Hence, C. Seed C germinates more with more water is the correct answer

The given experiment shows that Seed C's germination is directly proportional to the amount of water it receives. More water results in more sprouts.

From the given experiment results, the conclusion can be drawn that Seed C germinates more with more water. This is evident as the seed sprouted 16 times with a daily water method of 90 mL, 12 times with 50 mL, and not at all with 10 mL. So, the amount of sprouts is directly proportional to the amount of water provided, the more the water, the more the sprouts. This supports the option that Seed C germinates more with more water. Also, the heat was kept constant to ensure that it doesn't affect the experiment results.

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Answer: B) The measure of angle B equals the measure of angle C.

Answer: 4.41 joules

Explanation:

Given that:

work is done by gravity = ?

Mass of pine cone (m) = 50g

Convert mass in grams to kilograms

Since 1000g = 1kg

50g = (50/1000) = 0.05kg

Height of tree (h) = 9 m

Apply the formula for work,

Work = mass x acceleration due to gravity x height

Acceleration due to gravity has a value of 9.8m/s^2

Work = mgh

Work = 0.05kg x 9.8ms^2 x 9m

Work = 4.41J

Thus, 4.41 joules of work is done by gravity.

Answer:

4.5 J

Explanation:

I took the test

Answer:

stronger

Explanation:

its stronger because I don't have a good life for you guys but if I don't have a chance for it I can do it for you and I can get it to work on my own and then I can get a better idea

Final answer:

The electrostatic field created by a point charge is stronger the closer you are to the charge, due to the inverse relationship between field strength and distance. So the correct answer is option A.

Explanation:

The electrostatic field created by a point charge is stronger the closer you are to the charge. This is because the strength of the electrostatic field depends on the distance from the point charge, as described by Coulomb's Law. As the distance between charges decreases, the electrostatic force increases, resulting in a stronger field. When considering two unlike charges, the fields add together and become even stronger in the region between them because the fields from each charge are in the same direction. Conversely, the field is weaker at large distances, where the fields of individual charges may oppose each other, leading to a net effect of a weaker field. Examples from figures showing the electric fields demonstrate that field lines are closer together where the field is stronger, and farther apart where the field is weaker.

Answer:

False

Explanation:

It takes a bout 0.3 seconded for your body to response

Answer:

⊙false

Explanation:

Hope it help